The Research On Coding And Data Acquisition Techniques Of Office Chair Based On PDM

Under the background of informationization and economic globalization, office chair enterprises have encountered numerous problems in the course of attempting to informationize and restructure themselves. Research shows that as a technology of managing product information and process as well as a platform of integration and collaboration, PDM (Product Data Management) can effectively solve the above problems.Analyzes the basic structure of three kinds of office chairs of "ordinary office chair","routine office swivel chair","unconventional office swivel chair"; By analyzing the composition of assembly parts and their production processes as well as related materials of office chair parts, the relationship between the support structure and function, between the modelling and material composition of seat and back and the process of them is revealed; Thus the conclusion is made that the relationship amang the functional characteristics, the material composition and production process of office chair cannot be reflected by conventional classification methods, is not suitable for PDM applications. On the base of the conclusion, according to the principle of GT and standardization technology, a classification method of office chair and its assembly parts is proposed with the base of PDM, which be the research basis of office chair product, assembly parts and craft coding system. At the same time, through the analysis of development process of assembly parts in different materials, the office chair development data types are summed up to establish the office chair routine data classification system, and four key product data of template, cost, BOM. working hours are figured out. Finally, the office chair information structure tree is built up, and the office chair data system based on PDM is constructed after perfecting the routine data classification as the foundation of coding system of the paper.The office chair industry information coding system frame is drawn up according to the office chair information structure tree; Foundation on the office chair products classification method based on PDM, made the product model encoding rules; Introduces the concept of product structure tree to develop office chair parts coding rule according to the office chair parts classification method based on PDM; And the concept of SML to solve the challeging problem of how office chair and its parts code under multi-configuration conditions with a reference of German DIN4000standard. Based on the above, the coding rules of fabric, raw material, frock, drawing and document, process, equipment, instruments and other information are set up.Especially for solving the problem of how to digitize the non-digital product data, introduces the office chair graphics acquisition methods, puts emphasis on proposing two template data acquisition technology solutions of digitizer, digital picture with vector software and the corresponding output technology. Specific to the function and working conditions of PDM system’s reading the CAD drawings information, the rule of office chair CAD drawing and it’s template based on PDM is made with the reference of furniture drawing specification and the coding technique needs in this study, which establishes the interface specification for the integration of PDM and CAD system.Through the contrast experiments of the templates and workpieces from datas that are collected by the two template acquisition methods above-mentioned, outputting to two different CAM equipments of laser cutting machine and sponge cutting machine respectively, it is proved that the template output technology is feasible and suitable for the development and production of office chairs. Contrast and illustration have made on the functions of the two acquisition technologies in production and development as well.Through the experimental proofs of system configuration, data entry, comprehensive validation in three phases, the office chair PDM system, which is built on the basis of the office chair data system based on PDM, meets the requirements of PDM system operation and covers basically the data content of office chair industry, with the advantage of a clear classification and integrate structure in business type, category tree, material library and product library:It is also proved that the office chair coding technology, graphics acquisition technology and drawing specification proposed in the study are suitable for application to PDM system...